Device for finding the weight and stature of persons



Feb, 10, 1925.

K. TSUDA DEVI-CE FOR FINDING WEIGHT AND STTURE OF PER'SONS Filed Oct. 24, 1921 JN VENTO/e A TRNE Y l sente weight of bod Patented Feb. 1o, y

PATENT OFFICE.

UNITED STATES nm: renna, or maosHmA-m, .Tarma Dmc: ron mmc rm: wamrrr.l ama-sumen or ransom.

Application llled October 84, 1981. Serial No. 519,071.

To all whom it may concern:

Be it known that I, KANJI Tenna, a subi an, and a resl.- dent of No. 437, Kabeachi, Asa-Gori, Hiroshima-Ken, Empire of Japan, have 1nvented new and useful Im rovements in Devices for Findin the Weig t and Stature of Persons, of w ich the following is a specification.

This invention relates to devices for finding the weight. and stature of persons, and has for its object to provide a novel devlce bythe use of which the strength of the human body can be readily ascertained.

A further object ofthe invention is to provide a device of this character, which is .not only useful for hysicians, but at the same time equally a o table by and effective for oicials engaged in the examination of conscripts, applicants for life insurance, and in the corporal examination of emigrants, factory laborers and the like.

A lfurther object of the invention is to Y rovide a device of the character, which will effective and reliable in all such examinations.

The invention is more readily understood b referring to the accompanying drawing, sllown in perspective view.

Referring to the drawings the instrument proper or rather .the stationary bod portion of it, is represented by t e re erence .numeral 1,' upon which there are provided three longitudinal grooves 2, extending throughout its entire length and adapted to receive therein respectively slides 3, 3 and 3". The stationary body portion is also grooved along its outer sides and is adapted to engage corresponding edges ofthe cursor 4, of the construction similar to that of the ordinary slide rule, having frame 5, glass plate 6 and the usual hair line 7.

The slide 3 has graduation 8 which repre- Upon the u r side of the groove 2 is a duation 11 w 1ch re recents and is ivided into 14 equal visions, ing with seven years of and ending with 21 years. reports of the asetogrowattheaverageageof21,and

According to t e Government men this is why the graduation runs from 7 years of a to 21 years, the former being the schoo age.

U n the one side of the groove within whic slide 3" moves is anothergraduation 55 9, which represents height of body or stature.. We assume. that all human bodies are of similar solids.. Consequently we may assume that the wei ht of a human body varies directly as the ciie of its stature, and also the girth of chest varies vdirectly as the stature. Moreover we add an assumption that the constant of these variations or proportions are some functions of sexes and ages, and as this stature graduation is represented by a logarithm of a. number corresponding to the height of body the distance from zero point to certain other point will be log z-log 100,orlog 6, where- 100 de- 7'0 notes the number at zero nary slide rule. i

Now assuming L to denote stature and G to denote weight, then- Gem where K is a constant to be determined in accordance with stature and'v wei ht corresponding to the sexes and ages o statistical value of the respective countries.

The value of K remains constant so long as the sexes and ages remain same, but varies as soon as the sexes and ages are changed.

Now assuming the stature graduation be marked a at a certain point and ma at another point, and assummg the distance between a ma be shifted Afrom its original position to some other position the ratio of the number of the graduation on both extremio ties will be equal to the ratio of a and ma,

i. e., This is true throughout the entire point, as in an ordigraduation for stature, no matter how often 20. standard height at same age. Move the slide cube of L, and consequently by shifting the distance L -ma taken from stature duation on to the graduation of weight t e ratio of the number as represented at both ex rmiaes will be forinstaae, the distance between 100 centimeters tov 150 centi- The marking of this graduation 10 may v be effected as follows:

Move the slide so as to'cause the graduation of standard weight atcertain age to come into same line with the graduation of to this position,'then -note onthe slide the graduation 10 which will correspondwith the graduation 11 of same age.

It will be .seen that by causing a certain point ofsta-ture graduation to come into alignment with a certain point on the slide the ratioof the number of graduation. lying within thesame line will be constant, and therefore by causng'lthe graduation of ages on the slide to deviate from the graduation of ages on: the other side of the groove it .is possible to adjust the standard point of the ages.

Upon the slide 3 is marked a grading graduation 15. The yzero point of this grading scale is, as shown, located in the middle of the scale.

In the 'slide 3 the graduation running toward one direction is designated by a symbol plus while the graduation running toward other direction 1s designated by a symbol minus the number of degrees gradually increasing both ways from 'the zero point. The slide 3 has no such designations ,as plus or lninus, butvthe graduation gradually increases ltsnumber towards the rightand decreases towards the left.- Conveniently, the rear surface of this part of the scale may be. provided with certain graduations.

Now assuming two nien A, and B, respectively, whose standard Weights measure 25 k. g. and v50 k. g., respectively, vhile their actualweights measure 30 k. g. and 60 k. g. respectively, the ratio of excess of the actual Weight over that of the standard weight for A and B will be It will beobserved that in view of logarithmic graduation of the weight scale the space between 25 k. g. and 30 k. g. will be 'j ustment of ages.

where K is a constant to be equal to the space between 50 k. g. and 60 k. vg. By providing 'even graduation, therefoie, the gading scale is enabled to give to A and same degrees of grading. lIn short, by -making 'the Weight graduation logarithmic and alsoby havi the grade scale evenly graduated, it is possible to make the grading of weight scale so that the same may be directly proportional tothe ratio of excess or deficiency of-the actual weight relatively of the standard weight.

Upon the slide 3 is'ma'rked a graduation 12 which indicates girth of chest, having zero point fixed at one end of the'scale. Upon the one side of the groove in which slide 3 is arrangedto move is'marked a graduation 13 indicating the ages in the same manner as in the case of the graduation- 11. The slide 3 is also marked With graduation 14 serving to facilitate ad The manner inwhich this graduation is marked is as same as' previously described, i. e. move the slide so as to bring graduation of standard height at certa-in age into line with that'of the standard girth of chest ofl same age. l Cause the slide to stop at this point. The mark on the slide 3 the graduation'14 of same age will then correspond with the graduation 13 of that age.

Assuming that L denotes stature, U the girth of chest, then :-'-v U=KL determined according to the sexes and ages of the standard statistical value as previously described with regard to the weight. v

From the above it Will be seen that as the stature to graduation of isvlogarithmic the graduation of girth of chest. U will become equally logarithmic. By shifting from one point to another the distance between a-ma,

extremities -will be equall to the 4ratio' of the distance between a and ma i. e. This is true. of and equally established upon the graduation of the girth of chest.

In view of the charactertistc of the logarithm, when a ceitain point of the graduation 9, the ratio. will be 17%, which is the ratio ofthe number graduation on both- Therefore, by making the graduation of ages on the groove side to deviate from the graduation of ages on the slide it is possible to effect the alteration of the standard point.

Now assuming the standard girth of chest measure 60 c. In. while the'ac-tual girth of chest exceed 3 c. m., then the ratio of such excess will be If thestandard girth of chest of 90 c. m. is exceeded by 3 c. m.,

then the ratio of such excess will be 31,-), the ratio of the two is such that the former is worthtimes as much as the latter and consequently the grading of the former must be Worth times as much as' the latter. c

. In view of the fact that the girth of chest is lo arithmically graduated and in view of the act that the gradings are evenly graduated it is possible to give to -the former g times of degrees as much as the latter. In short, by marking the chest graduation logarithmically represented beside the graduation evenly divided, it is possible to mark `the grading of chest so that the same may 1 be directly proportional to the ratio of excess or deficiencies of the actual girth of ycheat relatively of the standard girth of tric'order as will be readily understood.

I will now proceed to explain the manner -X in which this instrument 1s actually used. The weight scale slide is first arranged accordin to the sex of the person to be examine move the age graduation of slide with the age graduation of the stationary body plate, then move the zero point of the third slide or grading slide to come into line with the stature graduation measured, move the cursor so as to cause its hair line to come to the weight graduation measured,

and the resultant graduation indicated by the hair line will be the grade required.

As tothe girth of chest the same operation may be followed, and in practice, the slide is first chosen to suit the sex of the person to be examined, and when the proper slide is placed in its position, the age graduation on the slide is caused to come in line with that of the stationary body plate, then brin the zero of the. grading scale into coinci ence with the stature graduation, move the cursor so as to cause its hair line to come upon the graduated mark of the girth of chest, and the resultant graduation 1ndicated by the hair line will be the grading required.

What I claim is 1. In a device for finding the weight and stature of persons, a body having a fixed age scale, a fixed ages scale, and a fixed lo arithmic stature scale, spaced apart, a sl1de having a logarithmic wei ht scale adjustable with respect to said xed logarithmic stature scale, and also having an age adjustment scale, adjustable with reference to said fixed ages scale, a slide having a grading graduation scale, a cursor adjustable lon itudinally on the body and arranged to e set to the said age adjustment scale to indicate the result on said scale and said fixed ages scale.

2. In a device for finding the weight and stature of persons, a body having a fixed age scale, a fixed ages scale, and a fixed lo arithmic stature scale, spaced apart, a slide having a logarithmic wei ht scale adjustable with respect to said xed logarithmic stature scale, and also having an age adjustment scale, adjustable with reference to said fixed ages scale, a slide having a grading graduation scale, a cursor adjustable lon tudinally on the body and arranged tole set to the said age adjustment scale to indicate the result on said scale and said fixed ages scale, and a slide arranged between said ed age scale and said fixed ages scale and having a logarithmic graduation girth scale and a scale for adjustment of ages, respectively adjustable with relation to said fixed age scale and said fixed ages scale.

In testimon whereof I affix my signature in presence o two witnesses.

KANJI TSUDA.

Witnesses.:

RGUICHI TODA, W. EBIHARAH. 

